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Aims <p><i>Rheum officinale</i> Baill. (ROB) is an important perennial medicinal plant that is prone to continuous cropping obstacles (CCO), which significantly reduces its yield and quality. This study aimed to systematically investigate the effects of different continuous cropping years on the rhizosphere soil ecological environment of ROB.</p> Methods <p>This study systematically analyzed the effects of different continuous cropping years of ROB on soil physicochemical properties, enzyme activities, 16S rDNA and ITS sequencing data, and untargeted metabolomics profiles.</p> Results <p>As the number of consecutive cropping years increased, soil pH decreased significantly. The content of readily available nutrients (AP, AK, and AN) peaked at mid-term and then gradually declined. ACP and SUC levels continued to rise, while the significant decrease in CAT activity affected redox buffering capacity. Both bacterial and fungal diversity initially increased before declining. Furthermore, significant interannual variations were observed in two phenolic metabolites: gallic acid derivatives and cis-resveratrol. Redundancy analysis and correlation studies indicated that soil pH, P, and AN were key drivers of microbial community dynamics, revealing significant associations between soil physicochemical factors and major metabolites.</p> Conclusions <p>Continuous cropping of ROB led to the deterioration of soil physical and chemical properties, the imbalance of key enzyme activities, changes in microbial community structure, and the abnormal accumulation of metabolites. Soil pH, P, AN, and phenolic acids play a key role in CCO. This study provides a theoretical reference for the bioremediation of CCO soil in ROB and other crops.</p>

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Continuous cultivation of Rheum officinale Baill. had a significant effect on physicochemical properties, enzyme activities, microbial communities, and rhizosphere metabolism in soil

  • 期刊论文

  • 发表日期：

    2025年11月24日

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  • Xiaolin Wan,
  • Jiaqi Wu,
  • Xiuzhi Wang,
  • Dazhai Zhou,
  • Qiang Xiao

摘要

Aims

Rheum officinale Baill. (ROB) is an important perennial medicinal plant that is prone to continuous cropping obstacles (CCO), which significantly reduces its yield and quality. This study aimed to systematically investigate the effects of different continuous cropping years on the rhizosphere soil ecological environment of ROB.

Methods

This study systematically analyzed the effects of different continuous cropping years of ROB on soil physicochemical properties, enzyme activities, 16S rDNA and ITS sequencing data, and untargeted metabolomics profiles.

Results

As the number of consecutive cropping years increased, soil pH decreased significantly. The content of readily available nutrients (AP, AK, and AN) peaked at mid-term and then gradually declined. ACP and SUC levels continued to rise, while the significant decrease in CAT activity affected redox buffering capacity. Both bacterial and fungal diversity initially increased before declining. Furthermore, significant interannual variations were observed in two phenolic metabolites: gallic acid derivatives and cis-resveratrol. Redundancy analysis and correlation studies indicated that soil pH, P, and AN were key drivers of microbial community dynamics, revealing significant associations between soil physicochemical factors and major metabolites.

Conclusions

Continuous cropping of ROB led to the deterioration of soil physical and chemical properties, the imbalance of key enzyme activities, changes in microbial community structure, and the abnormal accumulation of metabolites. Soil pH, P, AN, and phenolic acids play a key role in CCO. This study provides a theoretical reference for the bioremediation of CCO soil in ROB and other crops.